diff --git a/Cicm.Database/Schemas/Computer.cs b/Cicm.Database/Schemas/Computer.cs
index 1bf68e8e..857f7599 100644
--- a/Cicm.Database/Schemas/Computer.cs
+++ b/Cicm.Database/Schemas/Computer.cs
@@ -85,7 +85,7 @@ namespace Cicm.Database.Schemas
         public int Spu;
         /// <summary>Size in kibibytes for video RAM</summary>
         public int Vram;
-        /// <summary>Introduction date, 0 if unknown</summary>
+        /// <summary>Introduction date, 0 if unknown, 1000 if prototype</summary>
         public int Year;
     }
 }
\ No newline at end of file
diff --git a/Cicm.Database/Schemas/Console.cs b/Cicm.Database/Schemas/Console.cs
index 62285a27..c3001353 100644
--- a/Cicm.Database/Schemas/Console.cs
+++ b/Cicm.Database/Schemas/Console.cs
@@ -76,7 +76,7 @@ namespace Cicm.Database.Schemas
         public int Spu;
         /// <summary>Size in kibibytes for video RAM</summary>
         public int Vram;
-        /// <summary>Introduction date, 0 if unknown</summary>
+        /// <summary>Introduction date, 0 if unknown, 1000 if prototype</summary>
         public int Year;
     }
 }
\ No newline at end of file